Developed as a direct response to requests for a slimmed-down version of the High Level Hornblock. These units are totally compatible with our 'Standards' although you can use them on all axles for a low-profile look between the frames.
 
They were designed in conjunction with their own unique 'SpaceSaver Tags' to create extra clearance either side of the gearbox, allowing 'CSB' wires to be used on the driven axle.